The changes did pay dividends for Chelsea as Hazard restored their lead in the 85th minute before summer signing Willian secured the points with a stunning strike.

Eto'o was dispossessed and the ball fell to Willian on the right-hand corner of the box.

And the flamboyant Brazilian brilliantly curled the ball into the far corner with his left foot.

"It's good for the boy," Mourinho said at his post-match conference.

"It's difficult to arrive at the club when we had started the season already, and it's difficult to come from a league where normally a player loses a little bit of ambition, sharpness and condition. So step by step he's getting there."

Blues goalkeeper Petr Čech added: "He's settling in the team. It's not always easy when you come to the Premier League, you need a little bit of time to learn the language.

"He scored a fantastic goal which will give him a lot of confidence and I hope that it will help him settle in better."